Democratic presidential candidate Obama greets Senator Biden in Washington

 
Democratic presidential candidate Obama greets Senator Biden in Washington
Democratic presidential candidate Senator Barack Obama (D-IL) (R) greets Senator Joseph Biden (D-DE), chairman of the Senate Foreign Relations Committee, before the hearing testimony from US Commander in Iraq General David Petraeus and US Ambassador to Iraq Ryan Crocker on Capitol Hill in Washington April 8, 2008. REUTERS/Joshua Roberts (UNITED STATES)